Instant Pot Chicken Spaghetti Recipe: One-Pot Cheesy Comfort

There’s nothing quite like a warm, cheesy plate of chicken spaghetti to bring comfort to the table. This one-pot method simplifies the process while delivering restaurant-quality results with minimal cleanup.

The Instant Pot handles everything—tender chicken, perfectly cooked pasta, and a creamy sauce—all in 30 minutes. No pre-cooking, no extra pots, just a streamlined approach that locks in flavor.

You’ll end up with a dish that’s rich, satisfying, and packed with that classic cheesy goodness. The chicken stays juicy, the pasta absorbs the sauce beautifully, and every bite feels like a hug on a plate.

Ideal for busy weeknights or cozy family dinners. Here’s how to make it happen.

Ingredients for Instant Pot Chicken Spaghetti

One-pot comfort with tender chicken, creamy sauce, and perfectly cooked pasta ready in minutes.

The chicken quality affects the final dish. Boneless, skinless breasts work best for even cooking—Costco’s Kirkland brand offers excellent value for bulk. The spaghetti should be standard wheat pasta (not fresh or egg-based) for proper texture. For the cheddar, block cheese shredded at home melts more smoothly than pre-shredded, which often contains anti-caking agents that affect creaminess.

No cream of chicken soup? Cream of mushroom works as a direct substitute. For a lighter version, use half-and-half instead of heavy cream. The Rotel tomatoes can be swapped for plain diced tomatoes plus a diced jalapeño for similar heat. Vegetable broth works if you’re out of chicken broth, though the flavor will be slightly different.

Store leftovers in an airtight container in the fridge for up to 4 days. This dish doesn’t freeze as well due to the pasta, but it reheats beautifully on the stovetop with a splash of broth. Best enjoyed fresh when the sauce is at its creamiest.

Step-by-Step Instructions for Instant Pot Chicken Spaghetti

This one-pot method delivers tender chicken and perfectly cooked pasta with minimal effort and cleanup.

Step 1: Sauté Aromatics for Depth of Flavor

Set the Instant Pot to Sauté mode and melt the 2 tbsp butter. Add the 0.5 cup diced onion and 0.5 cup diced green bell pepper, cooking for 3-4 minutes until the onion becomes translucent and the pepper softens slightly.

Add the 3 cloves minced garlic and cook for an additional 30 seconds, stirring constantly to prevent burning. The garlic should release its fragrance without browning. This foundation builds the flavor base that defines the dish.

Sprinkle in the 1 tsp Italian seasoning, 1 tsp salt, and 0.5 tsp black pepper, stirring to coat the vegetables evenly. The spices will bloom in the hot butter, releasing their essential oils.

Step 2: Brown Chicken and Deglaze the Pot

Add the 1.5 lb boneless skinless chicken breasts (cut into bite-sized pieces) to the Instant Pot. Cook for 2-3 minutes per side until the chicken develops a light golden color. You’re not cooking it through—just searing for flavor and texture.

Pour in 0.5 cup of the chicken broth to deglaze the pot, using a wooden spoon to scrape up any browned bits from the bottom. These fond bits contain concentrated flavor that will enrich the final dish.

Add the remaining 2 cups chicken broth, the 1 can cream of chicken soup, and the 1 can Rotel tomatoes with green chilies (undrained). Stir to combine all ingredients thoroughly.

Step 3: Pressure Cook Pasta and Chicken Together

Break the 8 oz spaghetti in half and add it to the Instant Pot, pressing it down into the liquid so it’s fully submerged. Secure the lid, set the valve to Sealing, and cook on High Pressure for 8 minutes.

The pasta will absorb the rich, savory liquid as it cooks, infusing every strand with flavor. The chicken will finish cooking simultaneously, becoming tender and juicy. The Instant Pot’s sealed environment traps steam, cooking everything evenly.

Once the cooking time completes, allow a 5-minute natural release before switching the valve to Venting for a quick release. This prevents the pasta from overcooking while ensuring the chicken reaches a safe internal temperature.

Step 4: Finish with Cream and Cheese for Ultimate Creaminess

Stir in the 0.5 cup heavy cream to create a luxurious, velvety sauce. The cream tempers the acidity of the tomatoes and adds a rich, smooth texture that coats the pasta beautifully.

Gradually add the 2 cups cheddar cheese, stirring constantly until it melts completely and the sauce becomes smooth and glossy. The cheese should create long, stretchy strands when lifted with a spoon—a sign it’s properly incorporated.

Taste and adjust seasoning if needed, though the combination of soup, broth, and cheese typically provides a balanced flavor profile. The sauce should cling to the pasta and chicken, creating a cohesive, comforting dish.

Flavor Customization for This Recipe

Spice It Up

Add ½ tsp cayenne pepper or 1 diced jalapeño with the onions for a spicy kick. The heat balances the richness beautifully. I love how it wakes up the flavors without overpowering the dish. 🌶️

Herb Variations

Swap the Italian seasoning for 1 tsp dried basil and ½ tsp dried oregano for a more Mediterranean profile. Fresh herbs like 2 tbsp chopped parsley added at the end bring brightness.

Cheese Swaps

Try Pepper Jack for a melty, spicy twist, or Monterey Jack for milder creaminess. For extra richness, mix in ½ cup cream cheese with the cheddar. Each brings a unique character to the dish.

Veggie Boost

Add ½ cup diced mushrooms with the onions, or stir in 1 cup chopped spinach after pressure cooking. The mushrooms add umami depth, while spinach introduces freshness and color.

Creamy Upgrades

Replace the heavy cream with ½ cup sour cream for tang, or ½ cup evaporated milk for a lighter option. Both integrate smoothly into the sauce while offering different flavor dimensions.

Tomato Variations

For a milder version, use 1 can diced tomatoes instead of Rotel. For extra smokiness, add ½ tsp smoked paprika with the spices. These tweaks let you tailor the dish to your preferred heat and depth levels. 💡

Frequently Asked Questions